Name______Period___ Date______

Ch. 1: Matter and Change

Homework

Answer each of the following questions in the space provided. Please be as detailed in your answers as possible. Complete answers are not necessary as long as the question is answered. See Unit Plan for daily breakdown.

  1. Explain (using the various branches of chemistry) why chemistry does not fall into either “physical” or “biological” sciences.
  1. Explain why basic research is done.
  1. What is the difference between applied research and technological development?
  1. Define chemistry.
  1. List and describe the six branches of chemistry.
  1. What is a chemical? Are they safe? Give an example of a chemical that is safe and one that isn’t. Explain.
  1. Explain what an atom and a compound are. Give an example of each.
  1. Compare and contrast mass and matter.
  1. Explain the difference between an intensive and extensive property. Give an example of each.
  1. What is the difference between a physical and chemical property? Give an example of each.
  1. Classify each of the following as homogeneous or heterogeneous mixtures:

  1. iron ore
  1. type of plastic
  1. granite
  2. soft drink
  1. whole milk
  1. mud

  1. How can you tell the difference between a pure substance and a mixture?
  1. What are the two types of pure substances? Give an example of each.
  1. Classify each of the following as physical or chemical change:

  1. ice melting
  2. paper burning
  3. metal rusting
  4. pressurization of gas
  5. boiling water
  6. food digestion

  1. Explain the difference between a physical and chemical change.
  1. T/F: Energy changes are only involved with chemical changes. Explain.
  1. Describe the differences between gas, liquid, and solid states.
  1. A horizontal row of elements in the periodic table is a(n) ______, while a vertical column is called a(n) ______or ______.
  1. ______are elements that are good conductors of heat and electricity, while ______are elements that do not conduct.
  2. Most metals exist in ______state at room temperature and pressure.
  3. Most nonmetals exist in ______state at room temperature and pressure.
  1. Name and describe three characteristics of metals.
  1. Name and describe three characteristics of most nonmetals.
  1. Describe some characteristics of metalloids.
  1. Name and describe the characteristics of Group 18 elements.
  1. Do elements of the same group or period have more similar characteristics?
  1. Explain why some element symbols seem unrelated to the element name. Give an example.
  1. Name the two rows that are at the bottom of the periodic table. Why are they there?